docs: def _move_layers(self, layers, src, dest):
          """
          This moves all the layers that should be copied as-is.
          In other words - all layers that are not meant to be squashed will be
          moved from the old image to the new image untouched.
          """
          for layer in layers:
              layer_id = layer.replace('sha256:', '')
  
              self.log.debug("Moving unmodified layer '%s'..." % layer_id)
              shutil.move(os.path.join(src, layer_id), dest)